When a URL is given for loaderLogo under customization tag in config json, the page is stuck on the loading page. When we remove loaderLogo tag, the generic OnlyOffice logo appears and the page eventually loads. Please help, how can we have a loaderLogo?

We have a license for Integration Edition with white label feature on.We are looking for a technical solution to the issue.

And the issues is that only when I put http URL for logo on loaderLogo, the uploaded document is not loaded on browser.But when I remove URL of logo from loaderLogo, the document is rendered properly. Why is this happening so? What is the root cause and its solution?

According to your license you are able to customize the editor interface like id described here. If you mean by "LoaderLogo" the logo that appears while document is loading, in that case you cannot change it. Sorry for misunderstanding your first post.